@media all and (max-width: 500px){
    /* Mobile-Eigenschaften */
    #navi {
        position: static;
        background-color: #222299;
    }
    
    .navi_item {
        color: white;
        float: none;
        clear: both;
        text-decoration: underline;
        font-family: monospace;
        font-size: 2em;
        
        padding: 0px;
        margin: 10px 5px;
        height: auto;
    }
    
    #add_bar{
        background-color: #BBC0D0;
        padding: 2px 20px;
        font-size: 95%;
        height: auto;
        line-height: 1em;
        font-family: monospace;
    }
    
    #main_login {
        float: none;
    }
    
    .smart {
        display: inherit;
    }
    
    .default {
        display: none;
    }
    
    
}